|Publication number||US20050077407 A1|
|Application number||US 10/682,198|
|Publication date||Apr 14, 2005|
|Filing date||Oct 10, 2003|
|Priority date||Oct 10, 2003|
|Also published as||US6981667|
|Publication number||10682198, 682198, US 2005/0077407 A1, US 2005/077407 A1, US 20050077407 A1, US 20050077407A1, US 2005077407 A1, US 2005077407A1, US-A1-20050077407, US-A1-2005077407, US2005/0077407A1, US2005/077407A1, US20050077407 A1, US20050077407A1, US2005077407 A1, US2005077407A1|
|Original Assignee||Simon Huang|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (3), Classifications (7), Legal Events (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The present invention relates to an improved cutting blade for a shredder, especially to an elliptical acetabuliform blade that is integrally formed by punching a sheet metal in a mold machine.
The conventional shredders for cutting paper use a plurality of cutting blades and spacers engaging over a rotary cutter shaft, and the shearing force that two parallel and opposite rotary cutter shafts produce for transferring and cutting the paper-to-be-cut along a longitudinal direction into strips. Shredders can be classed into two types, the stripe-cut shredders and crosscut shredders, according to the machine cutting style. The former shredders arrange cutting blades to the rotating cutter shafts in a manner to cutting the paper in a longitudinal direction to form strips. The later shredders include blades that include more than one cutting edge, and each cutter is disposed helically along the rotary cutter shaft for first cutting paper along a longitudinal direction into strips and then cutting paper along a horizontal direction into approximate 4 mm×40 mm paper chips.
By referring to the assembled perspective view of a conventional blade illustrated in
During operating of the conventional blades, to ensure smooth cutting of the paper along the horizontal direction, sharp blades with proper orientations are needed. However, because the blades are formed by a punch molding, the mold wear that increases with the time will reduce sharpness of the blade edges, which does not improve until replacing the mold, to result in inconsistent quality. To ensure quality of the blades, it is necessary to shorten the service term of the mold, which results in increment of the cost. In addition, in the conventional blades, the thickness of the blade is the same as the width of the paper-to-be-cut. To ensure the strength of blades while cutting along the horizontal direction, the blades cannot be too thin, or else the blades tend to deform or fracture. Such a limitation attributes to the high material cost, which is less competitive as compared to the current market price. In addition, because the thickness of the conventional blades is same as the width of the paper-to-be-cut, and because the location of the width define the horizontal cutting points, the narrower width of cross-section is, the smaller output power is needed to cut along the horizontal direction. In other words, the motor can supply a minimum power for cutting along the horizontal direction, that is, to reduce the power consumed by the motor. But because of the width of the paper-to-be-cut by the conventional blades is 4 mm, the motor needs to output higher power to drive the blades and flanks moving in opposing directions to cut the paper along the horizontal direction smoothly.
In view of the above, this invention overcomes the shortcoming of the conventional blades.
The main objective of the present invention is to provide an elliptical acetebuliform blade for shredders, that is integrally punched from a sheet metal in a mold into an elliptical acetabuliform blade to effectively reduce the material cost and the weigh of the blade to thereby reduce the motor loading and power consumption.
Another objective of the present invention is to provide an elliptical acetabuliform blade for shredders, that uses the change in the curvature of the elliptical acetabuliform blade to cut paper into paper chips each having a wider center and tapering towards the ends, so as to reduce the power that that motor needs to output for cutting the two ends to thereby reduce the motor loading and the power consumption.
To realize the above objectives, in the present invention, a sheet metal is punched by a mold to integrally form an elliptical acetabuliform blade, where the periphery of elliptical blade is integrally formed into serration. The serrated periphery extending horizontally inwards to integrally form a planar disk for cutting paper along a longitudinal direction serves as a flank. The two ends along the major axis of the elliptical of the flank are integrally formed into a hooked edge for cutting the paper along a longitudinal direction to form paper chips having double-tapering ends. An inner edge of the flank then integrally extends inwards and downwards to form an arc base and then a circular base. A polygonal hole is formed in a center of the circular base, through which a rotary shaft may pass.
The present invention will be described in further detail hereinafter, with reference to accompanying drawings.
Please refer to FIGS. 3 to 5, where
As shown in the assembled perspective view of the present invention in
As exemplified in
As shown in the operating views in
In addition, the conventional blade is punched from a sheet metal having thickness of about 2 mm, while the elliptical acetabuliform blade of the present invention may be punched from a sheet metal having a minimum thickness of 0.2 mm, where the costs of the two materials are significantly different, and the reduced weight also helps to further reduce the power that the motor needs to supply to thereby increase the service-life of the motor and reduce the power consumption. These characteristics help to reduce the manufacturing cost and enhance the market competitiveness.
In summary, according to the present invention, a sheet metal may be punched into elliptical acetabuliform blades, where the periphery of each elliptical blade is integrally made into serration. The serrated periphery extending horizontally inwards to integrally form a planar disk for cutting paper along a longitudinal direction serves as a flank. The two ends along the major axis of the elliptical flank are each integrally formed into a hooked edge for cutting the paper along a longitudinal direction to form paper chips having double-tapering ends. The revolutionized construction of the present invention reduces power consumption, material cost, and lessens motor load, so as to enhance the market competitiveness of the shredder.
In the present specification “comprises means “includes or consists of” and “comprising” means “including or consisting of”.
The features disclosed in the foregoing description, or the following claims, or the accompanying drawings, expressed in their specific forms or in terms of a means for performing the disclosed function, or a method or process for attaining the disclosed result, as appropriate, may, separately, or in any combination of such features, be utilized for realizing the invention in diverse forms thereof.
LISTING OF NOMENCLATURES 1 cutting blade 11 periphery 110 serration 12 flank 13 cutting edge 14 base 15 base 16 polygonal hole 2 first rotary shaft 21 first blade 22 second blade 23 open space 3 second rotary shaft 31 first blade 32 second blade 33 hooked edges 4 paper chips
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US5199666 *||Jan 3, 1992||Apr 6, 1993||Williams Robert M||Rotary shredding apparatus with oscillating grate|
|US5516050 *||Feb 27, 1995||May 14, 1996||Basf Corporation||Industrial Rotary Shredder|
|US6454196 *||Jan 15, 1999||Sep 24, 2002||Terrence James Parke||Comminution devices|
|International Classification||B02C18/18, B02C18/14|
|Cooperative Classification||B02C18/142, B02C18/182|
|European Classification||B02C18/14B, B02C18/18D|
|Oct 10, 2003||AS||Assignment|
Owner name: MICHILIN PROSPERITY CO., LTD., TAIWAN
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HUANG, SIMON;REEL/FRAME:014596/0903
Effective date: 20030818
|Jun 30, 2009||FPAY||Fee payment|
Year of fee payment: 4
|Aug 16, 2013||REMI||Maintenance fee reminder mailed|
|Jan 3, 2014||LAPS||Lapse for failure to pay maintenance fees|
|Feb 25, 2014||FP||Expired due to failure to pay maintenance fee|
Effective date: 20140103